The Last Romanov:
'The Last Romanov' by Dora Levy Mossanen.
The Last Romanov follows Darya, a wise old beauty whose time spent with the Imperial family has haunted her entire life. When the murderous events unfold, Darya is plagued by the prophecy made by the Empress's advisor, Rasputin. She must find the missing Tsarevich Alexis Romanov and restore the monarchy or risk losing her own life.